CLA CLA Grading & Drainage 3

Question 1

What ADA requirement applies to cross-slopes of accessible pedestrian routes?

Accepted Answer

Maximum 1:50 (2%)

Answer

Maximum 1:20 (5%)

Answer

Maximum 1:12 (8.33%)

Answer

Maximum 1:10 (10%)

Question 2

Which instrument is traditionally used in the field to measure elevations and set grades during landscape construction?

Accepted Answer

Automatic level (builder's level)

Answer

Total station only

Answer

GPS rover only

Answer

Inclinometer

Question 3

A site has an impervious cover of 80%. Under the Rational Method, what coefficient (C) value would be most appropriate for runoff calculation?

Accepted Answer

0.75

Answer

0.20

Answer

0.45

Answer

0.95

Question 4

What grading element is used along the back of a curb to prevent water from flowing onto adjacent property?

Accepted Answer

Interceptor swale

Answer

Valley gutter

Answer

Crown road section

Answer

Daylight line

Question 5

Which contour interval would be most appropriate for detailed grading design on a relatively flat site (0–5% slopes)?

Accepted Answer

1 foot

Answer

10 feet

Answer

5 feet

Answer

25 feet

Question 6

What is 'daylight' in the context of a grading cross-section?

Accepted Answer

The point where a slope meets existing grade

Answer

The top of a retaining wall

Answer

The elevation of the water table

Answer

The finish floor elevation